It's been like this for 6 years with the woman's audio and 2 years with the man's. Let's be patient, a miracle is always possible.
Duo does not recognize the contraction of "is" with a noun. Basically, it's the result of slurred speech but when writing, use "Mom is".
I don't think there was a typo. I looked at it closely to be sure. But of course there is no going back! Thanks for your input.